Finding the Fourth Proportional to 13,119.83, 18,104.90 and 7,151.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,119.83 : 18,104.90 = 7,151.37 : x
2. Step 2: Convert to fraction form
   13,119.83/18,104.90 = 7,151.37/x
3. Step 3: Cross multiply
   13,119.83x = 18,104.90 × 7,151.37
4. Step 4: Simplify right side
   13,119.83x = 129,474,802.96
5. Step 5: Solve for x
   x = 129,474,802.96/13,119.83
6. Step 6: Final answer
   x = 9,868.64